I don't want to scare you, but there is "withdrawal-emergent tardive dyskinesia." See, antipsychotics cause TD and they also mask it. That's why increasing the dose of an antipsychotic makes TD symptoms less obvious, for a while; the tranquilizer suppresses the TD (for a lil bit...then it gets worse...).

In cases where it is, in fact, bona fide withdrawal emergent TD, the symptoms often get better over time. Having said that, zyprexa has a low rate of TD compared to many other tranquilizers, so that may not even be it.